Film making device

Abstract

The utility model relates to the technical field of lithium battery pole piece preparation, in particular to a membrane preparation device. Comprising a membrane preparation assembly used for membrane preparation and a rolling assembly connected with the membrane preparation assembly and used for membrane rolling. The membrane manufacturing assembly comprises two forming rollers which are horizontally arranged, abut against each other, can rotate relatively and are used for membrane rolling forming, and the two forming rollers are horizontally installed on the sides, away from each other, of the two forming rollers, can rotate around the forming rollers, abut against the forming rollers and can rotate around the forming rollers. The supporting rollers are used for supporting and reinforcing the forming rollers, and the feeding hopper is installed on the forming rollers and used for conveying powder for diaphragm forming to the position between the two forming rollers; the winding assembly comprises a guide roller arranged in the film conveying direction and used for directional film conveying, a first cleaning assembly used for film surface cleaning and a winding roller used for film winding.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pole piece preparation, in particular to a film making device. Background Art

[0002] The pole piece processing technology can be divided into a wet process and a dry process according to whether a solvent is used. In the wet process, a large amount of solvent is contained in the liquid slurry, and heating and drying the solvent will cause huge energy consumption. At the same time, the pole piece production process needs to wait for the solvent to evaporate, resulting in low production efficiency. Different from this, in the dry process, theoretically no solvent needs to be added. Under the solvent-free condition, a conductive film with a certain specification size is prepared by fibrillating the binder in the powder through multiple roller pressing processes, and the conductive film and the current collector are thermally pressed and compounded to obtain a dry electrode. The dry process does not require complex coating equipment and only requires continuous heating and rolling.

[0003] However, the existing pole piece forming equipment adopting the dry process has a complex structure design and a cumbersome process, resulting in low pole piece preparation efficiency and poor pole piece forming effect, which is not suitable for industrial applications.

[0004] Therefore, it is necessary to propose a technical means to solve the above defects. Summary of the Utility Model

[0005] The utility model adopts the following technical scheme:

[0006] A film making device includes a film making assembly for preparing a film sheet, and a winding assembly connected to the film making assembly for winding the film sheet; wherein,

[0007] The film making assembly includes two forming rollers that are horizontally arranged, mutually pressed, and can rotate relative to each other for roll forming of the film sheet, a support roller that is horizontally installed on one side of the two forming rollers away from each other, can rotate around itself, and is pressed against the forming rollers for supporting and strengthening the forming rollers, and a feeding hopper installed on the forming rollers for conveying the powder for film sheet forming between the two forming rollers.

[0008] The winding assembly includes a guiding roller arranged along the film sheet conveying direction for guiding the film sheet to be conveyed in a specific direction, a first cleaning assembly for cleaning the surface of the film sheet, and a winding roller for winding the film sheet.

[0009] Preferably, the film making assembly further includes a second cleaning unit installed below the forming rollers for cleaning the forming rollers.

[0010] Preferably, the second cleaning unit includes a scraper installed below the forming rollers and in contact with the forming rollers for cleaning the forming rollers, and a material receiving box installed below the scraper for receiving the powder scraped off by the scraper.

[0011] Preferably, the film forming assembly further includes a driving unit connected to the forming rollers for driving the two forming rollers to rotate relative to each other.

[0012] Preferably, the first cleaning assembly includes cleaning rollers arranged side by side.

[0013] Preferably, it further includes a rolling assembly installed between the film forming assembly and the winding assembly for compacting the film sheet; the rolling assembly includes two vertically arranged pressing rollers that can rotate around their own axes.

[0014] Preferably, it further includes a trimming assembly installed on both sides of the rolling assembly for trimming the edges of the film sheet before and after rolling.

[0015] Preferably, the trimming assembly includes knife rollers installed on both sides of the film sheet for trimming and cutting the edges of the film sheet.

[0016] Preferably, it further includes a laser thickness measuring assembly installed between the rolling assembly and the winding assembly for measuring the thickness of the film sheet output by the rolling assembly after rolling.

[0017] Preferably, the laser thickness measuring assembly includes a laser head for measuring the thickness of the film sheet.

[0018] A film forming device according to the present invention improves the efficiency of film sheet forming and winding through the settings of the film forming assembly and the winding assembly, and the film sheet forming effect is good, which is suitable for industrial applications. Description of the Drawings

[0019] Figure 1 It is an overall schematic diagram of a film forming device according to the present invention. Detailed Embodiments

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Please refer to Figure 1 , a film-making device, including a film-making assembly 10 for preparing a film sheet, and a winding assembly 20 connected to the film-making assembly 10 for winding the film sheet; wherein, the film-making assembly 10 includes two forming rollers 101 that are horizontally arranged and press against each other and can rotate relative to each other for roll-forming the film sheet, a support roller 102 that is horizontally installed on the side where the two forming rollers 101 are away from each other, can rotate around itself, and presses against the forming rollers 101 for supporting and strengthening the forming rollers 101, and a feeding hopper 103 installed on the forming rollers 101 for feeding the powder for film sheet forming between the two forming rollers 101;

[0024] The winding assembly 20 includes a guiding roller 201 arranged along the film sheet conveying direction for guiding the film sheet to be conveyed in a specific direction, a first cleaning assembly for cleaning the surface of the film sheet, and a winding roller 202 for winding the film sheet.

[0025] Specifically, in this embodiment, during operation, the feeding hopper 103 feeds the forming powder between the two forming rollers 101, and then the two forming rollers 101 rotate to roll-form the powder into a film sheet and convey it downward. During this process, the support roller supports the forming rollers 101, preventing the forming rollers 101 from deforming, thus solving the problem of uneven thickness of the film sheet after roll-forming, effectively improving the stability of the forming rollers 101 during operation, and at the same time improving the effect of roll-forming the powder by the forming rollers 101. Further, the film sheet formed by the forming rollers 101 is conveyed to the first cleaning assembly through the guiding roller 201 for surface cleaning, and then wound by the winding roller 202.

[0026] A film-making device related to the present utility model improves the efficiency of film forming and winding through the arrangement of a film-making component 10 and a winding component 20, and has a good film-forming effect, being suitable for industrial applications.

[0027] In a specific embodiment, the film-making component 10 further includes a second cleaning unit installed below the forming roller 101 for cleaning the forming roller 101. In this embodiment, through the arrangement of the second cleaning unit, the cleanliness of the forming roller 101 during operation is improved, thereby improving the film-forming effect. Further, the second cleaning unit includes a scraper 104 installed below the forming roller 101 and in contact with the forming roller 101 for cleaning the forming roller 101, and a material receiving box 105 installed below the scraper 104 for receiving the powder scraped off by the scraper 104.

[0028] In a specific embodiment, the film-making component 10 further includes a driving unit (not shown in the figure) connected to the forming roller 101 for driving the two forming rollers 101 to rotate relative to each other. The first cleaning component includes cleaning rollers 203 arranged side by side. Specifically, during operation, the film is located between the two cleaning rollers 203, and then the two cleaning rollers 203 are used to clean both sides of the film.

[0029] In a specific embodiment, it further includes a rolling component 30 installed between the film-making component 10 and the winding component 20 for compacting the film; the rolling component 30 includes two vertically arranged pressing rollers 301 that can rotate around themselves. In this embodiment, after the film is subjected to secondary rolling by the two pressing rollers 301, the material is more precise and has a greater density. Further, it further includes a trimming component 40 installed on both sides of the rolling component 30 for trimming the edges of the film before and after rolling.

[0030] In a specific embodiment, the trimming component 40 includes cutter rollers 401 installed on both sides of the film for trimming and cutting the edges of the film. Further, it further includes a laser thickness measuring component 50 installed between the rolling component 30 and the winding component 20 for measuring the thickness of the film output after rolling by the rolling component 30. Further, the laser thickness measuring component 50 includes a laser head for measuring the thickness of the film.

[0031] A film-making device related to the present utility model improves the efficiency of film forming and winding through the arrangement of the film-making component 10, the trimming component 40, the laser thickness measuring component 50, and the winding component 20, and has a good film-forming effect, being suitable for industrial applications.

[0032] The above embodiments only represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A film-making device, characterized in that: It includes a film-making assembly for preparing a film sheet, and a winding assembly connected to the film-making assembly for winding the film sheet; wherein, The film-making assembly includes two horizontally arranged and mutually pressed and relatively rotatable forming rollers for film roll forming, a support roller horizontally installed on the side of the two forming rollers away from each other and capable of rotating around itself and pressing against the forming rollers, and a feeding hopper for supporting and reinforcing the forming rollers, installed on the forming rollers, and used for conveying powder for film forming between the two forming rollers; The winding assembly comprises a guide roller arranged along the film conveying direction and used for directional conveying of the film, a first cleaning assembly used for cleaning the surface of the film, and a winding roller used for winding the film.

2. A film-making device according to claim 1, characterized in that: The film making assembly further includes a second cleaning unit installed below the forming roller and used for cleaning the forming roller.

3. A film-making device according to claim 2, characterized in that: The second cleaning unit includes a scraper installed below the forming roller and abutting against the forming roller for cleaning the forming roller, and a material receiving box installed below the scraper for receiving the powder scraped off by the scraper.

4. A film-making device according to claim 1, characterized in that: The film making assembly also includes a driving unit connected to the forming rollers and used for driving the two forming rollers to rotate relative to each other.

5. The film-making device according to claim 1, characterized in that: The first cleaning assembly includes cleaning rollers arranged side by side.

6. A film-making device according to claim 1, characterized in that: It also includes a rolling assembly installed between the film making assembly and the winding assembly for compacting the film; the rolling assembly includes two pressing rollers which are vertically arranged and can rotate around themselves.

7. A film-making device according to claim 6, characterized in that: It also includes a trimming assembly installed on both sides of the rolling assembly and used for trimming the edges of the membrane before and after rolling.

8. A film-making device according to claim 7, characterized in that: The trimming assembly comprises knife rollers installed on both sides of the diaphragm and used for trimming the edges of the diaphragm.

9. A film-making device according to claim 6, characterized in that: It also includes a laser thickness measuring component installed between the rolling component and the winding component, and is used to measure the thickness of the film output after rolling by the rolling component.

10. A film-making device according to claim 9, characterized in that: The laser thickness measuring assembly comprises a laser head for measuring the thickness of the membrane.

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